Brownsville Intl climate by month
Averages and records for each calendar month at Brownsville Intl, United States, from 1898 to 2026. The warmest month is August, averaging 34.5°C; the coolest is January at 21.5°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 21.5°C | 10.8°C | 35.0°C21 January 2017 | −7.2°C12 January 1962 | 103 / 103 |
| February | 23.1°C | 12.3°C | 34.4°C20 February 1912 | −5.6°C13 February 1905 | 102 / 103 |
| March | 25.9°C | 15.4°C | 41.1°C27 March 1984 | −2.2°C5 March 1901 | 102 / 102 |
| April | 28.8°C | 19.0°C | 40.0°C26 April 2017 | 2.8°C15 April 1903 | 101 / 101 |
| May | 31.2°C | 22.1°C | 40.0°C9 May 2024 | 10.0°C8 May 1901 | 102 / 102 |
| June | 33.2°C | 24.0°C | 40.0°C7 June 2019 | 13.3°C3 June 1919 | 102 / 102 |
| July | 34.0°C | 24.4°C | 40.0°C29 July 2003 | 15.6°C8 July 1901 | 102 / 103 |
| August | 34.5°C | 24.4°C | 41.1°C28 August 2023 | 16.7°C16 August 1931 | 104 / 104 |
| September | 32.7°C | 22.9°C | 40.6°C5 September 2000 | 10.6°C29 September 1909 | 102 / 103 |
| October | 29.8°C | 19.2°C | 37.2°C7 October 1900 | 1.7°C31 October 1993 | 101 / 101 |
| November | 25.8°C | 15.0°C | 36.7°C1 November 1906 | −2.8°C30 November 1911 | 101 / 102 |
| December | 22.4°C | 11.6°C | 34.4°C5 December 1977 | −9.4°C20 December 1901 | 101 / 103 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 101 to 104 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.